US PATENT SUBCLASS 352 / 18
.~.~.~ By position of sound transducer of separate sound means

Current as of: June, 1999
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352 /   HD   OPTICS: MOTION PICTURES

1  DF  WITH SOUND ACCOMPANIMENT {12}
12  DF  .~ Picture and sound synchronizing {7}
15  DF  .~.~ Sound record controls picture {2}
18.~.~.~ By position of sound transducer of separate sound means

DEFINITION

Classification: 352/18

(under subclass 15) Subject matter in which the control is effected by the position of a normally moving sound transducer in a separate sound recorder or reproducer.